package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        // 1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        // 2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            // 账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            // 密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            // 账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        // 3、返回实体对象
        return employee;
    }

    @Override
    public PageResult pageSelectEmployee(EmployeePageQueryDTO employeePageQueryDTO) {

        Employee employee = new Employee();

        BeanUtils.copyProperties(employeePageQueryDTO, employee);

        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        List<Employee> employees = employeeMapper.pageSelectEmployee(employee);

        Page p = (Page) employees;

        return new PageResult(p.getTotal(), p.getResult());
    }

    @Override
    public void insertEmployee(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();

        BeanUtils.copyProperties(employeeDTO, employee);

        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        employee.setStatus(StatusConstant.ENABLE);

        employeeMapper.insertEmployee(employee);

    }

    @Override
    public Employee selectEmployeeById(Long id) {

        List<Employee> employees = employeeMapper.pageSelectEmployee(Employee.builder().id(id).build());
        return employees.get(0);
    }

    @Override
    public void updateEmployee(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();

        BeanUtils.copyProperties(employeeDTO, employee);

        employeeMapper.updateEmployee(employee);

    }

    @Override
    public void updateEmployeeStatus(Integer status, Long id) {

        employeeMapper.updateEmployee(Employee.builder().id(id).status(status).build());

    }

    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        if (passwordEditDTO.getOldPassword().equals(passwordEditDTO.getNewPassword())) {
            throw new PasswordErrorException(MessageConstant.OLD_PASSWORD_AND_NEW_PASSWORD_SAME);
        }
        List<Employee> employees = employeeMapper.pageSelectEmployee(Employee.builder().id(BaseContext.getCurrentId()).password(DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes())).build());
        if (employees.size()==0) {
            throw new PasswordErrorException(MessageConstant.OLD_PASSWORD_EDIT_FAILED);
        }
        Employee employee = employees.get(0);
        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
        employeeMapper.updateEmployee(employee);
    }


}
